Another way the tear film may be conceptualized is as a 2 layer system. The inner layer is made up of a combination of the mucus and aqueous layers to form a mucoaqueous gel layer. The outer second layer is the lipid layer.

Articulated buses were invented to improve the manoeuvrability of long buses capable of carrying a large number of passengers.

The difference between the perspectives of organic chemists (who view all ligands that have replaced a hydrogen atom in the parent compound as comparable and thus would nomenclate the lithium compound as 1-Lithio-, ...

an insane asylum